test coverage (and fix) resetting x/y limits in scatter viewer

lcviz/state.py

@@ -28,7 +28,7 @@ def _reset_att_limits(self, ax):
             setattr(self, f'{ax}_min', ax_min)
             setattr(self, f'{ax}_max', ax_max)
 
-    def _reset_x_limit(self, *event):
+    def _reset_x_limits(self, *event):
         self._reset_att_limits('x')
 
     def _reset_y_limits(self, *event):

lcviz/tests/test_viewers.py

@@ -0,0 +1,19 @@
+
+def test_reset_limits(helper, light_curve_like_kepler_quarter):
+    helper.load_data(light_curve_like_kepler_quarter)
+    tv = helper.app.get_viewer(helper._default_time_viewer_reference_name)
+
+    orig_xlims = (tv.state.x_min, tv.state.x_max)
+    orig_ylims = (tv.state.y_min, tv.state.y_max)
+    # set xmin and ymin to midpoints
+    new_xmin = (tv.state.x_min + tv.state.x_max) / 2
+    new_ymin = (tv.state.y_min + tv.state.y_max) / 2
+    tv.state.x_min = new_xmin
+    tv.state.y_min = new_ymin
+
+    tv.state._reset_x_limits()
+    assert tv.state.x_min == orig_xlims[0]
+    assert tv.state.y_min == new_ymin
+
+    tv.state._reset_y_limits()
+    assert tv.state.y_min == orig_ylims[0]